I Appear to Have a 'Button' Near the Tip of my Nose That Affects the Airflow Between my Nostrils. I'm Guessing That's Not Normal

it sounds like you would benefit from seeing a good rhinoplasty surgeon. There can certainly be issues with your septum or other support structures that can cause airway problems. You can also discuss your cosmetic concerns. Good luck.

 There are many different causes for nasal obstruction and facial headaches which include a deviated nasal septum, turbinate hypertrophy, chronic sinusitis, allergic  nasal polyps, valve collapse and vestibular stenosis. Each one of these issues are treated differently. It is probably best to seek out an ENT/ facial plastic surgeon to address these  functional issues as well as in a cosmetic issues simultaneously. Please see our website link below for reference